Pump



2 Sheets-Sheet 1 PUMP w. l. DERRICK Filed Augyls, 1927 l April l0, 1928.

lNVENT BY d? M ATTORNEY April 10, 1928.

W. l. DERRICK PGM@ Filed Aug. 18. 1927 2 Sheets-Sheet 2 JUA/N00.

INVENT/OR ATTORNEYS Patented Apr. 10, 1928.A

UNITED STATES PATENT OFFICE.

WILLIAM I. DERRICK, OF DAVENPORT, IOWA, ASSIGNOR TO WESTCO-CHIPPEWA PUMPCOMPANY, OF DAVENPORT, IOWA, A CORPORATION OFA DELAWARE.

PUMP.

Application led August 18, 1927. Serial No. 213,813.

hThis invention relates to rotary pumps of t e t ent o. 16,074,granted'on May 19 1925, in Iwhich there is a rotor provided adJacent itsperiphery with impeller blades and in which a assage is provided alongside the e disclosed in the Wahle Reissue Pat h impeller lades throughwhich water may.

have an'unimpeded iow from the pump inlet to the pump outlet, meansbeing provided for preventin back iow from the outlet to the inlet so tat the water is caused to flow through the passage by the impllingaction of the vanes, causing suction at theinlet and y buildin up apressure at the out-let.

An object of the present invention is to provide a rotary pump of thecharacter above referred to in which the impelling vanes are disposedinwardly of the periphery of the rotor and in which lateral thrust onthe rotor is avoided.

A further object is to provide a `pump in which the unobstructedrv waterpassage from the inlet to the outlet is entirely within the rotor. l

With the above and other objects in view, the invention may be said tocomprise the rotary ump as illustrated in the accompanying drawingshereinafter described and partlcularly set forth in the appended claims,'together with such variations and modifications thereof as will beapparent to one skilled in the art to which the invention aprtains.

y ference should be had to the accompanying drawingsk forming a part ofthis specification in which:`

Figure 1 is a sectional elevation of the pump with a portion of the pumpto the bearing Referring to the accompanyingdrawings, t e pumpcasing isshown formed in two sections indlcated by the reference numerals 1 and2, the casing sections being provided with peripheral ianges 3\which aresecured together by bolts 4.

Section 1 of the casing has :formed integrally therewith a base 5 whichis adapted to be'secured to a suitable support and the base -5` carriesa bearing` member 6. The opposite section ofthe casing is formed with anintegral bracket 7, which carries a bearing member/8 in axial alignmentwith the member 6. `A shaft 9 is journaled in the caring members 6 and 8and extends centrally through the casing, the lcasing members beingprovided/with glands 10 to prevent leakage of .water around the shaft.

A rotor 11 is iixed to the shaft 9 within the casing and this rotor ispreferably in the "form of a disc having a continuous periphright of thecenter lane ofthe rotor shown' in section Fig. 2,.

Fig. 2 is a side elevation ofthe pump with a portion of the casingbroken away to show the rotor.

Fi 3 is a sectional view taken onv the line indicated at 3--3 in Fig. 2.

Y Fig.A 4 is a sectional view taken on the line indicated at 4-4 in Fig.2.Y Fig/5 is anaxial section showing a modledform of the invention.

p Fig. 6 is an axial section showing a further modification of theinvention. n

` Fig. 7 is a fragmentary vside elevatlon of the -rotor shown ink Fig.6.

eral portion 12 and a continuous inner portion 13, the peripheralportion 12 and the inner portion /13 being joined by a central web 14and integral vanes 15. Each of the l vanes 15 is provided with a notch16 extend- 80 ing inwardly fromits outeredge and termlnating short ofthe web 14, the notches 16 being of a width slightly less than thelength of the vanes 15. The notches 16 in the vanes 15 are so disposedas to provide continuous unobstructed annular channels ineach face ofthe rotorll. The casing is provided with a peripheral inlet 17 and aperipheral outlet 18, the inlet 17 being connected with the annularchannels upon opposite faces of the disc by passages 19, and the outlet18 is connected to the channels by means of passages 20. fTheoppositeinternalfaces of the casing are substantially flat and lie inclose proximity to the continuous peripheral and inner t portions 12 and13 of the disc so as to prevent any substantial leakage of water to thei p periphery and center of the casing. Water entering through theopposite inlet passages 19 is carried along by the vanes, and the un-100 obstructed channel formed by the notches 16 of the vanes permits acontinuous flow of water from the inlet to the outlet.

To'cause the water to ow from the channels in the rotor into the outletpassages 20,' 105 the opposite walls of the casing are provided withinternal Aprojections 21 which have a close t in the notches 16 :formedin the tially a distance sufficient to covera seal is provided betweenthe inlet and outlet which prevents the water under pressure at theoutlet from flowing to the inlet.

In Fig. 5 of the drawing there is shown' a modification of the inventionin which the rotor 22 is provided with a single annular channel 23 inone face thereof, impeller vanes 24 being provided at the 'bottom of thechannel. Casing 25 has a close fit upon the rotor as inthe modificationfirst described. The inlet and outlet`ar`e arranged in substantially thesame manner and the flow from the outlet to the inlet is obstructed tliechannel 23 as in the modification first described. i A furthermodification of the invention is Y shown in Figs. 6 and 7 of the drawingin is obstructed by which the -rotor 26lisl provided with a continuousperipheral portion 27 anda continuous inner portion 28 which areconnected by integralV vanes 29 which are disposed centrall of therotor. rI he rvanes 29 are of a width considerablydess than thethickness of the rotor so that an unobstructed annular channel isprovided on each side of the venes. Casing 30 closely overlies the rotoras in the modifications previously described, but in view of the factthat the channels on opposite sides of the rotor are in communicationthrough the spaces between the vanes it is not necessary to provideinlet and outlet passages to both sides of the rotor.

As in the modification first described, thefiow of water between theinlet and outlet dprojections on the wall of the casing exten ing intothe channels, the water in this case bein forced out through a singleout-let at the side of the casing.

In each of the modifications above de scribed, an unobstructed channelfor fiow of water from the inlet to the .outlet is provided in the rotoritself and the casing is formed to obstruct this channel between the finlet and outlet so that there can be no substantial leakage of waterfrom theoutlet back to the inlet and the water is impelled in acontinuous stream from the inlet to the outlet. The wall of the casingforms one side only of the channel so that a comparatively smallstationary surface area is in contact with the moving stream of waterand consequently there is little frictional resistance to the fiow ofwater through the channel.

In the modification shown in Figs. 1 to. 4, lateral thrust-on the rotoris balanced by providing identical channels and impellin vanes uponopposite 'sides of the rotor an in the modification shown in Fig.Glateral a portion of the casing extending intov thrust on the rotor isavoided by-providing transverse apertures through the rotorl between theimpelling vanes. It 'will be apparent, therefore, that the presentinvention, by employing a construction in which the lchannel for thewater is in the rotor, provides a rotary pump of simple and compactdesign in which the frictional resistance to the passage of waterthrough the pump from the inlet to the out- /let is materially reduced,and that by pre-l venting unbalanc'e'd lateral pressure on the rotorthere is little tendenc for the rotor to get out of true and thefrictional resistance to turning movement of the rotor is reduced.

Furtl'iermore, it is to be understood ,that

lthe particular forms of apparatus .shown and described, and theparticular procedure set forth, are presented for purposes ofexplanation and illustration and that various modifications of saidapparatus and rocedure can be made without departing rom myinvention asldefined in the appendedv claims.

What I claim is: f

1. A rotary pump comprising a rotor having a continuous annular channeltherein and impeller varies alongside the channel, and a casing havingportions closely overlying the rotor on opposite sides of the channel,and having an inlet and an outlet communicating with said channel, saidcasing vhaving an inwardly projecting portion obstructing said channelbetween the inlet and the outlet to prevent return flow from' the outletto the inlet.4 l

2. A rotary pump comprising a rotor in the form of a disc havin acontinuous annular channel in a' face t ereof and impeller vanesalongside the channel, and a casingv having a side thereof closelyoverlying the face of the disc on opposite sides of the channel andhaving an inlet and an outlet com- Iunicating with the channel, saidcasing having a portion obstructing said channe between the inlet andoutlet.

3. A rotary pump com rising a rotor having an annular fluid con uctingchannel, inwardly from its periphery and concentric therewith, saidchannel being open at one side of the rotor and having vanesextendingacross the same and inset with respect to the side face of the rotor,and a casing which has a wall closely overlying the side face of i therotor inwardly and outwardly of the channel and provided with an inletand an outlet bbth communicating with said channel, said casing having-apartition member between the outlet and yinlet extending into saidchannel and closely overlying said vanes.

4. A rotary pump com rising a rotor having an annularfluid con uctingchannel, inwardly from its periphery and concentric therewith, saidchannel being open at one '1 side of the rotor and having vanesextending across the same and inset with respect to the side face of therotor, and a casing which has a wall closely overlying the side face ofthe rotor inwardly and outwardly of the channel and provided with aninlet and an outlet both communicating with said channel, the side wallof the casing having an integral internal projection intermediate theoutlet and inlet fitting in the channel and closely overlying saidvanes, said projection extending circumferentially a suicient distanceto overlie a plurality of vanes.

5. A rotary pump comprising a rotor in the form of a substantially flatdisc having annular channels upon opposite sides .thereof, and a casinghaving substantially Hat sides closely overlying' opposite faces of saiddisc -and inlets and outlets in said sides communicating with thechannels of the disc, said casinghaving partition members pro ectinginto the channels between the out ets and inlets.

6. A rotary pump `cornprising aA rotor in the form of a disc having acontinuous peripheral portion and a continuous inner portion, integralvanes connecting said inner and peripheral portions, said rotor having acrontlnuous v annular channel formed by notches 1n said vanes, and acaslng having a wall closely overlying thefinner and pe- 4 WILLIAM I.DERRICK.

